HOUSTON (Reuters) - Houston-area oil refineries were unaffected by heavy rains that caused flooding across wide areas of the city Monday night and Tuesday morning, the companies and industry sources said on Tuesday.

Rainfall totals over 7 inches (17.8 cms ) were recorded by the Harris County Flood Warning System in the past 24 hours. Houston police reported 24 rescues from high water by Tuesday evening.

A spokesman for Marathon declined to discuss operations at the company's refineries in Texas City, as did a Valero Energy Corp <VLO.N> spokeswoman asked about the company's Houston and Texas City refineries.

A Petrobras <PETR4.SA> spokeswoman did not reply to a message about the company's Pasadena, Texas, refinery.